<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="content-type" content="text/html;charset=utf-8"/>
        <title></title>
    </head>
    <body>

        <style type="text/css">
            .layout{
                width: 1080px;
                margin: auto;
            }
            .header{
                background-color: red;
            }
            .main{
                background-color: #ddd;
                padding: 0;
                margin: 0;
                border: 0;
                width: 1080px;
            }
            .footer{
                background-color: #666;
            }
            .layout>.main>.left{
                background-color: black;
                color: #ffffff;
            }
            .workspace{
                border: 1px solid orange;
                background-color: #ffffff;
                width: 70%;
                float: left;
                box-sizing: border-box;
            }
            
            #ws{
                border-width: 2px;
            }

            div{
                color: violet;
            }

            .layout div{
                color: teal;
            }



            .right{
                background-color: firebrick;
                color: #ffffff;
            }

            .container{
                box-sizing: border-box;
                padding: 0;
                margin: 0;
                border: 0;
                display: table;
                width: 100%;
            }

            .container>.col-1,.container>.col-2,.container>.col-3,.container>.col-4{
                box-sizing: border-box;
                padding: 0;
                margin: 0;
                border: 0;
                display: table-cell;
            }
            .container>.col-1{
                width: 25%;
            }
            .container>.col-2{
                width: 25%;
            }
            .container>.col-3{
                width: 25%;
            }
            .container>.col-4{
                width: 25%;
            }

        </style>
        <div class="layout">
            <div class="header container">
                <h1 class="col-3">我的博客</h1>
                <div class="col-1">dr,退出</div>
            </div>
            <div class="main container">
                <div class="left col-1">
                左边部分
                </div>
                <div class="workspace col-2" id="ws">
                    <div class="container articles">
                        <div class="col-1 article"></div>
                        </div>
                    工作区
                </div>
                <div class="right col-1">
                右边部分
                </div>
            </div>
            <div class="footer">
            这是结尾
            </div>
        </div>
    </body>
</html>